Pencil-sharpener



C. E. STONE.

PENCIL SHARPENER. V

APPLICATION FILED AUG..|3. 19x9.

1,341,9 3 Patented June 1,1920.

CHARLES E. STONE, OF BOSTON, MASSACHUSETTS.

PENCIL-SHARPEN ER.

Specification of Letters Patent.

Patented June 1 1920.-

Application filed August 13, 1919. Serial No. 317,149.

To all whom it may concern:

Be it known that 1 CHARLES E. STONE, a citizen of the United states,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Pencil-Sharpeners,of which the following is. a specification, reference being had to theaccompanying drawings. 7

This invention relates to improved pencil sharpeners, and one of theobjects of the invention is to provide a simple, efficient and practicaldevice of this kind, which can lac-manufactured at a relatively low costand sold at a reasonable profit. 7

It is well understood that pencil sharpeners of various characters havebeen heretofore produced and in most of them the holder for the pencilis rotated at the same time the grinding member is operated, and sincethe lead in the pencil is very often eccentric to the outer surface ofthe wood, the wood will be ground away unevenly with relation to thelead.

Therefore, it is the aim of the present invention to provide a pencilsharpener including a standard on which a rotating member is mounted,and which member carries an abrading or grinding element, in combinationwith a holder, so' positioned relatively to the grinding element, thatthe pencil may be held at an angle to the element, and by rotating thepencil independently of the holder, the wood around the lead may beground away evenly.

While the design and construction at present illustrated and set forthis deemed preferable, it is obvious that as a result of a reduction ofthe invention to a more practical form for commercial purposes, theinvention may be susceptible to changes, and the right to these changesis claimed, pro vided they are comprehended within the scope of what'is'claimed.

The-invention comprises further features andcombination of parts, aswill-be hereinafter set forth, shown in the drawings and claimed.

In the drawings:

Figure 1 is a view in perspective of an improved pencil sharpenerconstructed in accordance with the invention.

Fig. 2 is a view in elevation showing the side of the pencil sharpeneropposite to that shownin Fig. 1.

Fig. 3 is a vertical sectional view on line 33 of Fig. 2.

Fig. 4: is a detailed perspective view of the receptacle detached.

Fig. 5 or abrading element detached from the r0- tating member.

Fig. 6 is a detail plan View of the pencil sharpener showing therotating member and lllustrating the pencil holder disposed at an acuteangle to the abrading face of the rotating member, whereby a pencil maybe held correspondingly.

Referring to the drawings, 1 designates a suitable base, which may befastened by screws or the like 2 toany suitable stationary support, suchas that shown, and rising upwardly from the base isa standard 3.-Theupper part of the standard has a diskor circular shaped portion 4,which is provided with a screw-threaded socket 5. The

upper extremity of the standard terminates in a tubular holder 6, whichis open at both ends. The base, the standard and its disk or circularshaped portion, and the tubular holder may be made in a single casting,though not necessarily, for it is obvious that they can be otherwiseconstructed.

A headed journal pin 7 is threaded; into the threaded socket 5, and.rotatably supported on its cylindrical part 8 adj acent the head of thepin is the hub portion 9 of the. rotating member 10. This rotatingmember 10 is in the form of a concave-convex disk, hence it is providedwith an annular flange 11, which is provided with an annular shoulder12. It is to be noted that the convex face of the disk or rotatingmemberis substantially fiat near its center, and this surface extends radiallyfor a considerable dis tance, then the surface annularly curves orbevels oif toward the flange. A grinding element'13, preferably a pieceof sand or emeryspaper, thoughnot necessarily, is applied to the convex.face of the disk for grinding points upon pencils. A disk 14 is arrangedupon the journal pin between the grinding element and the disk shapedportion of the standard and is provided with diametrically opposite pins15. These pins penetrate through openings 16 of the grind ing elementand into'the openings 17 of the rotating member or disk, so that thedisk,

is a detailed v1ew ofthe grinding.

which is between the standard and the 'A suitable brass, steel, or othermetal ring 20 of suitable diameter and any suitable thickness is forcedover the grinding element, keeping the portions 19 between the cut awayportions flat against the flange of the rotating member. This ring 20 isslipped far enough on the flange of the rotating member to contact withthe annular shoulder, thereby preventing movement of the ring in onedirection. Since the sand or emery surface of the grinding element facesoutwardly, the ring binds sufficiently therewith to prevent its movementin the opposite direction. A suitable handle 21 is swiveled on the journalpin 22, whichis carried by the rotating member or disk, so thatrevoluble movement may be imparted to said member.

A sleeve 23 is fitted telescopically in the tubular holder 6, and isadapted to receive a pencil such as indicated at 24:, whereby a pointmay be ground on one end thereof. This sleeve 23 is provided with aplurality ,of longitudinally diametrically opposite slits 25 and 26 atits opposite ends, which cause pluralities ofspring tongues 27 and 28 tobe formed at the opposite ends of the sleeve. By virtue of these springtongues frictionally engaging with the pencil 24, the pencil is held inposition. However, it is not held so firmly that it cannot be turned byhand, for it is the aim that the pencil should be manipulated revolublyas the grinding element rotates, so that the point of the pencil may beground evenly throughout its length. The cylindrical tubular holder atthe upper end of the standard is angular with relation to the standardand disposed at an acute angle to the grinding surface of the grindingelement, so as to hold the pencil at an acute angle'to such surface, s0as to form a tapered point on the end of the pencil. F urthermore, thetubular holder at the upper end of the standard is inclined slightlydownwardly in order to facilitate the cutting away of the pencil sincethe rotating member moves in.

the direction indicated by the arrow a in Fig. 1. s a

A receptacle 29, which is in the form of a single casting, is secured bymeans of a screw 30 to the standard. -This receptacle is preferablysemi-circular in form, though not necessarily, and is'secured to thestandard concentrically'with the rotating memher. The wall 31 of thereceptacle is provided with a semi-circular cut away portion 32 toreceive the spacing disk between the grinding element and the disk ofthe standvof this character.

the handle of the rotating member may freely move, when impartingmovement to the member. 1

The circular wear plate 14:, preferably,

though not necessarily, has the two pins 15 formed integrally therewith,and these pins 15, as previously stated, penetrate through the openings17 of the rotating member or; disk, so that the wear plate mayrotatejwith the disk or member, and also hold the grinding element orsand paper in place. In fact, the pins 15 are designed to be cast solidon the wear plate. 1

It will be noted that the holder is on the standard to so receive thepencil and hold it at an angle to the grinding or abrading surface thatthe pencil may be turned around at, will, so that the wood of the pencilmay be. ground away evenly with relation to the lead regardless ofwhether the lead is eccen= tric or concentric relative to the wood.Also, the pencil may be moved longitudinally through the holder, so asto grind a point of any suitable length. Furthermore, suitable meanshave been afforded, to secure the abrading or grinding element to therotating element or disk, consisting of the notches adjacent the edge ofthe element, so that it may be folded over the marginal periphery of therotating member, in combination with a ring which is slipped over thegrinding element to-clamp it in place. Furthermore, by means of the disk14:, the grinding element is held spaced from the standard, so as toprevent injury of the same by contact; with the standard. Moreover, thereceptacle is constructed in such wise and secured to the standardrelative to the rotating'memher, as to receive the dust and dirt, whichresults in sharpening pencils with a grinder It will be noted that owingto the receptacle being cut away, and its particular construction andthe manner of applying it to the standard, permits the rotating memberto be easily detached from the standard, and the abrading or grindingelement removed, without disturbing the receptacle. Furthermore, thecut-away por-' tion of the receptacle allows free movement of the handleof the rotatable member.

- The invention having been set forth, what is claimed as new and usefulis:

In a pencil sharpener, the combination with a standard having asupporting base at its lower end, its upper end being pro- Vided with adetachable journal pin, of a circular rotatable member rotatably mountedupon said pin, an abrading element on the face of the member adjacentthe standard, a disk plate having lateral pins passing through theelement and into the member and being mounted upon the pin, therebyholding the central part of the abrading element closely in contact withthe member and spacing the abrading element from the standard, the upperend of the standard carrying a holder at an acute angle to the abradingelement and adapted to adjustably slidably receive a pencil to besharpened, and a receptacle secured to the standard having one wallbetween the standard and the abrading element, and its other wall cutaway to permit movement of a handle on the signature.

7 CHARLES E. STONE.

